April is one of the cooler months of the year in New Haven, with average highs near 13.8°C and lows around 2.4°C (mean 8.1°C). It is about average for rainfall, averaging 105 mm of rainfall and 79% relative humidity across the period.
April is one of the cooler months of the year in New Haven. Across 45 years of records, the warmest April in New Haven was 2023 — when the month averaged 10.7°C — while the coldest was 1982 at 5.2°C. Typical April days reach 13.8°C with nights near 2.4°C. The long-term trend is warming, about 0.3°C per decade.
April is about average for rainfall in New Haven, averaging 105 mm of rainfall. The wettest April on record was 1983 with 285 mm, while the driest was 2013 at 35 mm.
Relative humidity in New Haven during April averages 79%. The most humid April was 1983 at 86%, and the least humid was 2012 at 71%.
April receives about 4.8 kWh/m²/day of solar energy in New Haven. The sunniest April was 2012 at 5.8 kWh/m²/day, and the cloudiest was 2000 at 3.8.
Average wind speed in New Haven during April is 0.2 m/s. The windiest Aprils were 2020, 2022 and 2024, among others at 0.3 m/s, while the calmest were 2021, 2023 and 2025, among others at 0.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 7.5°C | 7.7°C | 8.3°C | 8.4°C | 8.6°C | +1.1°C |
| Avg High | 13.2°C | 13.3°C | 14.1°C | 14.2°C | 14.2°C | +1°C |
| Avg Low | 1.9°C | 2.0°C | 2.4°C | 2.6°C | 3.0°C | +1.1°C |
| Avg Rain | 118 mm | 96 mm | 111 mm | 96 mm | 108 mm | -10 mm |
April temperatures in New Haven have risen by about 1.4°C between 1981–1985 and 2021–2025.
April has ranged from a record low of -10.9°C (1982) to a record high of 32.7°C (2002).
Rainfall in April is about average for rainfall, averaging 105 mm, with a wettest year of 285 mm.
A good time to visit New Haven
April is a good time to visit New Haven, with days averaging 13.8°C and nights around 2.4°C (mean 8.1°C, cooler than New Haven's yearly average) and higher rainfall. August and July are marginally more temperate, but April still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 14.7°C | 9.1°C | 3.5°C | 24.9°C | -4.2°C | 76 mm | 74% | 0.2 m/s | 4.7 |
| 2024 | 14.1°C | 8.7°C | 3.3°C | 25.9°C | -2.0°C | 112 mm | 82% | 0.3 m/s | 4.4 |
| 2023 🔥 | 16.7°C | 10.7°C | 4.7°C | 30.8°C | -4.2°C | 127 mm | 78% | 0.2 m/s | 4.6 |
| 2022 | 13.3°C | 7.7°C | 2.1°C | 22.8°C | -2.4°C | 117 mm | 76% | 0.3 m/s | 5.2 |
| 2021 | 15.0°C | 8.9°C | 2.7°C | 24.7°C | -4.8°C | 82 mm | 76% | 0.2 m/s | 4.9 |
| 2020 | 11.5°C | 6.5°C | 1.6°C | 18.7°C | -3.6°C | 131 mm | 79% | 0.3 m/s | 4.2 |
| 2019 | 14.4°C | 9.0°C | 3.5°C | 21.4°C | -3.8°C | 170 mm | 82% | 0.2 m/s | 4.5 |
| 2018 | 11.1°C | 5.7°C | 0.2°C | 22.2°C | -4.5°C | 125 mm | 80% | 0.3 m/s | 4.3 |
| 2017 | 16.2°C | 10.6°C | 4.9°C | 25.6°C | -2.6°C | 97 mm | 81% | 0.2 m/s | 4.4 |
| 2016 | 13.6°C | 7.7°C | 1.8°C | 24.3°C | -7.1°C | 68 mm | 73% | 0.3 m/s | 5.2 |
| 2015 | 13.4°C | 7.5°C | 1.7°C | 21.5°C | -3.8°C | 73 mm | 79% | 0.2 m/s | 4.9 |
| 2014 | 13.3°C | 7.1°C | 1.0°C | 19.8°C | -5.3°C | 134 mm | 79% | 0.2 m/s | 5.1 |
| 2013 | 14.0°C | 8.0°C | 2.0°C | 21.2°C | -4.7°C | 35 mm | 73% | 0.3 m/s | 5.6 |
| 2012 | 15.1°C | 9.0°C | 3.0°C | 27.9°C | -2.0°C | 73 mm | 71% | 0.2 m/s | 5.8 |
| 2011 | 14.3°C | 9.1°C | 3.9°C | 23.4°C | -2.3°C | 133 mm | 83% | 0.2 m/s | 4 |
| 2010 | 16.3°C | 10.3°C | 4.4°C | 25.8°C | 0.5°C | 50 mm | 80% | 0.2 m/s | 5.3 |
| 2009 | 14.8°C | 9.0°C | 3.1°C | 29.3°C | -3.4°C | 84 mm | 77% | 0.2 m/s | 4.9 |
| 2008 | 15.2°C | 9.2°C | 3.1°C | 25.4°C | -4.9°C | 88 mm | 78% | 0.2 m/s | 5.2 |
| 2007 | 11.8°C | 6.6°C | 1.4°C | 22.6°C | -4.2°C | 218 mm | 82% | 0.2 m/s | 4.3 |
| 2006 | 15.2°C | 9.0°C | 2.8°C | 23.9°C | -2.7°C | 137 mm | 77% | 0.2 m/s | 5.2 |
| 2005 | 15.0°C | 8.7°C | 2.3°C | 25.3°C | -3.0°C | 129 mm | 79% | 0.3 m/s | 5.4 |
| 2004 | 14.0°C | 8.3°C | 2.6°C | 23.3°C | -3.8°C | 150 mm | 80% | 0.2 m/s | 4.6 |
| 2003 | 11.6°C | 6.2°C | 0.8°C | 24.8°C | -5.2°C | 74 mm | 81% | 0.2 m/s | 4.5 |
| 2002 | 16.3°C | 10.1°C | 3.9°C | 32.7°C | -5.7°C | 87 mm | 73% | 0.2 m/s | 4.9 |
| 2001 | 14.5°C | 8.4°C | 2.2°C | 25.6°C | -4.0°C | 38 mm | 76% | 0.2 m/s | 5.2 |
| 2000 | 12.8°C | 7.4°C | 2.0°C | 21.4°C | -3.2°C | 102 mm | 81% | 0.3 m/s | 3.8 |
| 1999 | 14.5°C | 8.2°C | 1.9°C | 20.6°C | -3.2°C | 38 mm | 74% | 0.2 m/s | 5.1 |
| 1998 | 14.1°C | 8.4°C | 2.8°C | 21.6°C | -1.5°C | 113 mm | 80% | 0.2 m/s | 4.7 |
| 1997 | 12.0°C | 6.6°C | 1.2°C | 19.7°C | -4.7°C | 79 mm | 78% | 0.3 m/s | 5.3 |
| 1996 | 12.2°C | 7.1°C | 1.9°C | 21.8°C | -4.1°C | 190 mm | 83% | 0.3 m/s | 4.5 |
| 1995 | 12.8°C | 6.8°C | 0.8°C | 18.8°C | -6.2°C | 71 mm | 73% | 0.2 m/s | 5.1 |
| 1994 | 14.3°C | 8.6°C | 2.8°C | 23.5°C | -3.2°C | 72 mm | 81% | 0.2 m/s | 5.1 |
| 1993 | 13.4°C | 7.8°C | 2.1°C | 21.2°C | -3.1°C | 127 mm | 84% | 0.2 m/s | 4.7 |
| 1992 | 11.5°C | 6.1°C | 0.6°C | 20.8°C | -3.6°C | 67 mm | 79% | 0.2 m/s | 4.5 |
| 1991 | 14.9°C | 9.3°C | 3.6°C | 24.2°C | -3.5°C | 87 mm | 79% | 0.2 m/s | 4.8 |
| 1990 | 13.2°C | 7.9°C | 2.7°C | 28.3°C | -4.3°C | 118 mm | 83% | 0.2 m/s | 4.4 |
| 1989 | 12.1°C | 6.4°C | 0.8°C | 21.5°C | -4.0°C | 95 mm | 78% | 0.3 m/s | 4.9 |
| 1988 | 12.5°C | 7.0°C | 1.6°C | 17.8°C | -3.7°C | 53 mm | 79% | 0.2 m/s | 4.3 |
| 1987 | 13.3°C | 8.2°C | 3.1°C | 22.4°C | -3.9°C | 178 mm | 85% | 0.2 m/s | 4.2 |
| 1986 | 13.9°C | 8.2°C | 2.5°C | 23.0°C | -3.2°C | 54 mm | 81% | 0.2 m/s | 4.6 |
| 1985 | 15.2°C | 9.1°C | 3.0°C | 25.4°C | -4.8°C | 37 mm | 73% | 0.2 m/s | 4.8 |
| 1984 | 13.0°C | 7.7°C | 2.4°C | 22.0°C | -4.2°C | 140 mm | 85% | 0.2 m/s | 4.4 |
| 1983 🌧️ | 12.5°C | 7.4°C | 2.4°C | 24.4°C | -2.9°C | 285 mm | 86% | 0.3 m/s | — |
| 1982 ❄️ | 11.5°C | 5.2°C | -1.0°C | 21.6°C | -10.9°C | 124 mm | 80% | 0.3 m/s | — |
| 1981 | 14.6°C | 8.4°C | 2.1°C | 21.5°C | -4.6°C | 93 mm | 76% | 0.3 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 13.8°C with lows near 2.4°C (mean 8.1°C), based on 45 years of NASA POWER data.
April averages 105 mm of rainfall in New Haven, about average for rainfall. The wettest on record was 285 mm in 1983.
The hottest April reached 32.7°C in 2002. The coldest dipped to -10.9°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 1.4°C. Daytime highs moved from 13.4°C to 14.8°C and overnight lows from 1.8°C to 3.3°C over the same span.
April is one of the cooler months of the year in New Haven and about average for rainfall, so plan for around 13.8°C daytime highs and 2.4°C at night.
Not quite — April is the 6th coolest month in New Haven, averaging 8.1°C.
For April in New Haven, pack warm layers and a jacket for chilly mornings, with typical highs of 13.8°C and lows of 2.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in April averages 79% — quite humid.
Average wind speed in April is 0.2 m/s. The windiest April on record averaged 0.3 m/s (1981).
The wettest April on record was 1983 with 285 mm. On average, April sees 105 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in New Haven behaves each April, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for April specifically, along with year-by-year records and how the month has changed over the decades.
